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Allergy testing

House dust mite testing

Testing for the most common indoor allergen - the usual suspect behind year-round sneezing, blocked nose and morning symptoms.

Key facts

At a glance

  • The clue: symptoms all year round, worst on waking and in bed - unlike pollen allergy, which follows the seasons.

  • Testing: skin prick or specific IgE blood tests confirm dust mite sensitisation in a single appointment or blood draw.

  • Results: skin tests read in 20 minutes; blood results typically within one to two weeks privately.

  • What helps: evidence supports mite-proof bedding encasings, hot washing and humidity control as a package, alongside nasal sprays.

  • Follow-up: for persistent symptoms despite treatment, an allergist can discuss dust mite immunotherapy tablets.

The full picture

What this test involves, and how to get it

House dust mite is the most common cause of perennial allergic rhinitis - the year-round version of hay fever whose signature is a blocked, runny nose and sneezing that are worst in bed and on waking, often with disturbed sleep and morning tiredness that get misattributed to everything else. Mites live in mattresses, pillows and soft furnishings, feeding on shed skin. Skin prick testing or a specific IgE blood test confirms sensitisation quickly, and in someone with the classic pattern a positive test essentially closes the case.

Confirmation changes management in two ways. First, avoidance measures are worth doing properly or not at all: allergen-proof mattress and pillow encasings, washing bedding hot, and keeping humidity down work as a package, while single half-measures achieve little. Second, for people whose symptoms persist despite steroid nasal sprays and antihistamines, sublingual dust mite immunotherapy tablets taken daily for three years can substantially reduce symptoms. NHS allergy referral waits vary widely; private clinics can test within days and start immunotherapy where appropriate, with an indicative cost confirmed before booking.

A quiet reminder

This guide is for information, not medical advice.

Your own clinician knows your history and can tell you which parts apply to you. Next review of this page: 2027-09-27.

Frequently asked

Common questions about House dust mite testing.

Quick, plain-English answers to what people ask us most.

  • What is house dust mite testing?

    House dust mite testing checks whether your immune system reacts to proteins from house dust mites, tiny creatures commonly found in bedding, carpets, and soft furnishings. This is usually done via a skin prick test or a blood test measuring specific IgE antibodies.

  • Why would a doctor order house dust mite testing?

    It is typically used when someone has symptoms such as sneezing, a blocked or runny nose, itchy eyes, or asthma flare-ups that are worse indoors, particularly at night or first thing in the morning, suggesting a possible allergy.

  • Do I need to prepare for house dust mite testing?

    For a skin prick test, you will usually be asked to stop antihistamines for several days beforehand, as they can suppress the skin's reaction and affect accuracy. For a blood test, no special preparation is typically needed. Your clinic will confirm exact instructions.

  • What happens during the test?

    A skin prick test involves placing a small drop of allergen extract on the skin, usually the forearm, and gently pricking the surface, then observing for a raised, itchy bump over about 15 to 20 minutes. A blood test simply involves a standard blood draw.

  • Does house dust mite testing hurt or have risks?

    Skin prick testing causes minimal discomfort, similar to a mild scratch, and reactions are usually confined to the test site. Rarely, a more significant allergic reaction can occur, which is why testing is done under medical supervision. Blood tests carry only the usual minor risks of a standard blood draw.

  • How long do results take?

    Skin prick test results are available within about 20 minutes during the appointment itself, while blood test results typically take a few days.

  • What happens if my test is positive?

    A positive result supports a diagnosis of house dust mite allergy, and your doctor will discuss management options, which often include reducing dust mite exposure at home, appropriate antihistamines or nasal treatments, and in some cases a discussion about immunotherapy.

  • Is house dust mite testing accurate and reliable?

    Both skin prick and blood tests are well-validated methods for detecting sensitisation, though a positive test shows your immune system reacts to the allergen, which is not always the same as having clinically significant symptoms; results are interpreted alongside your history.

  • How much does private house dust mite testing cost, and is it on the NHS?

    It is available on the NHS through allergy clinics when clinically indicated, though referral waits can vary. Private allergy clinics offer quicker access with specialist review; cost varies by provider.

  • How do I book this privately, and how quickly can I be seen?

    Private allergy clinics can often arrange testing and a specialist consultation within a matter of days.